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3 years ago

1/5 as a decimal..........

Mathematics

2 answers:

GalinKa [24]3 years ago

6 0

.20 or .2 is your answer because 20/100 is equal to 1/5

Fofino [41]3 years ago

4 0

.2 is 1/5 as a decimal, because 2/10 broken down is 1/5. we have to write it this way (0.2) because there is no fifths place.

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3 years ago

Two step inequalities 5x-7_>8

Naddik [55]

Answer:

x ≥ 3

Step-by-step explanation:

5x - 7 ≥ 8

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3 years ago

An English teacher needs to pick 1111 books to put on his reading list for the next school year. He has narrowed down his choice

forsale [732]

Answer:

There are 3,659,040 ways he can choose the books to put on the list.

Step-by-step explanation:

There are

12 novels

8 plays

12 nonfiction.

He wants to include

5 novels

4 plays

2 nonfiction

The order in which the novels, plays and nonfictions are chosen is not important. So we use the combinations formula to solve this problem.

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

How many ways can he choose the books to put on the list?

Novels:

5 from a set of 12. So

$C_{12,5} = \frac{12!}{5!7!} = 792$

Plays:

4 from a set of 8. So

$C_{8,4} = \frac{8!}{4!4!} = 70$

Nonfiction:

2 from a set of 12

$C_{12,2} = \frac{12!}{2!10!} = 66$

Total:

Multiplication of novels, plays and nonfiction.

$T = 792*70*66 = 3,659,040$

There are 3,659,040 ways he can choose the books to put on the list.

4 0

3 years ago